Imazu Sports Park (a completed landfill site)

Tennis courts

Imazu School for Handicapped Children

Imazu “Refresh” Farm

Fukuoka City Environmental Bureau

Fukuoka City Landfills

East（Fushitani）Landfill

West（Nakata）Landfill

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East （Fushitani）Landfill

・・・Landfillboundarybou da y

Total area： Approx. ６４４，０００㎡Filled area ：Approx. ２２５，０００㎡

3

Capacity : Approx. ３.７４ million ｔ (３.4 million ㎥)Time duration ：Since April １９８８

Hisayama Grounds Golf Course, created in Zone 1 of the completed landfill

Area of former landfill site：１３ ０００㎡

23 Oct 2009

Area of former landfill site：１３，０００㎡８ holes （240m）×２ coursesBeginning of service：August ２００７

West（Nakata）landfill

Grounds (Total area)

Landfill zone （Filled area）

Grounds (Total area)

Total area ：380,000㎡Filled area：

Capacity：（As of late March 2009 655 000 t (~28％filled ）

,

180,000㎡

2,380,000 t (1.8 million m3)

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（As of late March 2009, 655,000 t (~28％filled ）Time duration：~20 years since 1996

March 2007

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August 2007

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October 2009

Gas vent

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Opening of the leachate collection & drainagepipe

Construction of leachate collection & drainage pipe

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Solid Waste Retaining Structure

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Development of the Fukuoka Method（Semi-Aerobic Landfill Structure)

Fukuoka City’s landfill around １９７０（Hatta Landfill ）Until the 1960~70s、Japan, like many other Asian countries today, used anaerobic landfills

Lead to environmental problems such as toxic leachate and foul odor

The start of experiments to improve landfills, aiming to purify leachate

Experiments by Fukuoka City and Fukuoka UniversityAn Test Plant was constructed at Hisayama Landfill in １９７３Left: Aerobic landfill experiment Right: Improved anaerobic landfill experimentLeft: Aerobic landfill experiment, Right: Improved anaerobic landfill experiment

Impact of Fukuoka Method: Leachate Treatment

Anaerobic landfill

90% decomposed

Semi-aerobic landfill

Anaerobic Aerobic99.9% decomposed

Semi-aerobic landfill

Aerobic landfill

Passage of time (years)

Improvement over time of the landfill structure and leachate’s biological oxygen demand (BOD) (combusible waste)

Passage of time (years)

There are essentially 3 landfill methodsThere are essentially 3 landfill methods

①Anaerobic

Waste• High emissions of harmful substances such as CO2, methane, etc

• Waste is in a leachate state

②Aerobic (Cross-section)• Relatively less emission of harmful substances such as CO2, methane, etc

Waste • Easy treatment of leachate• High cost of construction and maintenance

Fukuoka Method③Semi-aerobic （Cross-section)

• Relatively less emission of harmful substances such as CO2, methane,

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etc• Easy treatment of leachate• Low construction and maintenance costs

Fukuoka Method（Semi-aerobic landfill method structure）Diagram

Waste decomposition Temperature gap between landfill interior/exteriorFermentation heat

15Air circulation

Advantages of the Fukuoka Method

The Fukuoka Method:

An efficient landfill method （＝Semi-aerobic landfillAn efficient landfill method （＝Semi-aerobic landfill structure） with low environmental impact developed jointly by Fukuoka City and Fukuoka University

Key aspects

1 Advanced technology unnecessary

2 Low cost2 Low cost

3 Environmentally friendly

Construction of Fukuoka Method Landfill Fukuoka City

新蒲田埋立場

The first landfill in Japan to use the semi-aerobic landfill structureShinkamata Landfill (１９７５)

全景Sports park

Example of utilization of a completed landfill site

Farmland

School for

Refresh farm Waste water treatment plant

handicappedchildren

Post-landfill Site Utilization－Imazu Sports Park－

Zuibaiji River

Imazu landfill – Images from period of landfill construction pe od o a d co st uct o(1９７５～１９９９)

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Imazu Today: Utilization of a Former Fukuoka Method Landfill Site

T i t ソフトボール場I S h l fTennis court Imazu School for

Handicapped Children

Imazu Refresh Farm

International Cooperation

Pakistan Waste Treatment Technology Training

People’s Republic of China:Landfill in Weifang City, Shandong Province

O t b 2003Landfill area ６４，０００ｍ２Capacity ~１.１６ million ｍ３Time duration ~３ yearsDaily waste intake ~７００ｔ

October 2003

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23Sept 2004

Fukuoka City／Hakata Bay west coast zoneFukuoka City／Hakata Bay west coast zone